Bad recentering of the WL images due to field with “relatively bright stars”

[kulpster85]

Description

Encountered an issue with the recenter function during routine wavefront sensing. The Center of mass was off due to other bright stars in the field. This is an update to force the center of mass to not be biased by nearby stars.

Expected behavior

Recenter the brightest star in the field.

Actual behavior

The center of mass was offset which caused the center of the PSF to be miscalculated, resulting in NaN(s).

Steps to Reproduce

Run QUIP with an Operation File with Operation WAVEFRONT_MAINTENANCE with the following input images: (which can be obtained from MAST)
jw02726-o097_t020_nircam_f212n-wlm8-nrca3_wfscmb-04.fits
jw02726-o097_t020_nircam_f212n-wlp8-nrca3_wfscmb-05.fits

1. Download the images from MAST: https://mast.stsci.edu/portal/Mashup/Clients/Mast/Portal.html?searchQuery=%7B%22service%22%3A%22JWSTFILTERED%22%2C%22inputText%22%3A%5B%7B%22paramName%22%3A%22filter%22%2C%22niceName%22%3A%22filter%22%2C%22values%22%3A%5B%22F212N%22%5D%2C%22valString%22%3A%22F212N%22%2C%22isDate%22%3Afalse%2C%22facetType%22%3A%22discrete%22%2C%22displayString%22%3A%22F212N%22%7D%2C%7B%22paramName%22%3A%22observtn%22%2C%22niceName%22%3A%22observtn%22%2C%22values%22%3A%5B%5D%2C%22valString%22%3A%22097%22%2C%22isDate%22%3Afalse%2C%22freeText%22%3A%22097%22%2C%22displayString%22%3A%22097%22%7D%2C%7B%22paramName%22%3A%22program%22%2C%22niceName%22%3A%22program%22%2C%22values%22%3A%5B%5D%2C%22valString%22%3A%2202726%22%2C%22isDate%22%3Afalse%2C%22freeText%22%3A%2202726%22%2C%22displayString%22%3A%2202726%22%7D%2C%7B%22paramName%22%3A%22act_id%22%2C%22niceName%22%3A%22act_id%22%2C%22values%22%3A%5B%2205%22%2C%2204%22%5D%2C%22valString%22%3A%2205%2C%2004%22%2C%22isDate%22%3Afalse%2C%22facetType%22%3A%22discrete%22%2C%22displayString%22%3A%2205%2C%2004%22%7D%2C%7B%22paramName%22%3A%22detector%22%2C%22niceName%22%3A%22detector%22%2C%22values%22%3A%5B%22NRCA3%22%5D%2C%22valString%22%3A%22NRCA3%22%2C%22isDate%22%3Afalse%2C%22facetType%22%3A%22discrete%22%2C%22displayString%22%3A%22NRCA3%22%7D%2C%7B%22paramName%22%3A%22productLevel%22%2C%22niceName%22%3A%22productLevel%22%2C%22values%22%3A%5B%223%22%5D%2C%22valString%22%3A%223%22%2C%22isDate%22%3Afalse%2C%22facetType%22%3A%22discrete%22%2C%22displayString%22%3A%223%22%7D%5D%2C%22position%22%3A%22undefined%2C%20undefined%2C%20undefined%22%2C%22paramsService%22%3A%22Mast.Jwst.Filtered.Nircam%22%2C%22title%22%3A%22JWST%3A%20%20Advanced%20Search%201%22%2C%22tooltip%22%3A%22F212N%3B%20097%3B%2002726%3B%2005%2C%2004%3B%20NRCA3%3B%203%3B%20%22%2C%22columns%22%3A%22*%22%7D
2. Create a Operation File that provides the downloaded images: see example: https://github.com/spacetelescope/wss_tools/blob/master/wss_tools/tests/data/operation_file_001.xml
3. quip <operation_file>
4. Verify the error is thrown at recenter.py, line 90

offsetdata = np.roll(data, (xcntr - int(ycpsf),
                                        ycntr - int(xcpsf)),
                                 axis=(1, 0))
ValueError: cannot convert float NaN to integer 

System Details